Why can't my child go into negative balance?
Currently, RoosterMoney does not allow children to go into overdraft or negative balance, however, this is something we're looking into.
In the interim, a workaround some parents have used to manage this is by creating a goal called "loan" or similar. If you know what you've advanced your child, you can create a Goal with this amount. This goal can then become their first priority to pay off. You can also edit a goal to add extra money if another 'loan' is made, which you can find the instructions for in the related article at the bottom of the page.